25kg high quality Pp kraft paper valve bag for packing food

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1.Pp kraft paper bag is eco-friendly
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Competitive price with excellent quality

Q: Is the packet in the food package a reducing agent or an oxidizing agent?: The ingredients of food reducing agents are some vitamins, phenols, iron powder and so on. Because these substances react readily with oxygen, they protect the food from being oxidized,

Q: What's the raw material of the cement packing bag?: The raw material is polypropylene resin cement packaging bags, mainly for foreign production of polyethylene (PE), mainly for the domestic production of polypropylene (PP), then add some additives, after the heating wire drawing, then weaving, printing and so on, the higher the quality of the cement bag inner lining!

Q: What kind of material is the express package on the market now? It's dark in the outer grey.: It's a special packing bag for express delivery. That kind of paper bag, like post office, is specially designed to pack the things you want to express.Wrap things up and seal them in a bag.Some sellers or buyers need such bags when they are delivered. Some express to the seller to buy money.

Q: What are the soft and hard sides of plastic bags? Material or process technology?: In general, the soft, and toughness and strength are greater, the quality is the best, most durable. Of course, the price should be higher.As for you, which kind of good, depends on your use, cheap, and can meet the use of, that is good, not necessarily have to buy many high priced! The one that suits you is the best!

Q: Printing process of packaging bag: For the surface or irregular surface can be used heat transfer, adhesion is good, not easy to fade, but requires a transfer equipment.Screen printing belongs to orifice plate printing. It is called four printing methods together with flat, convex and gravure printing. Hole printing includes transcription, mesh flower version, stencil printing and screen printing etc.. Printing the principle is: (a version of the base paper or other version of the film version of the ink can be made through holes) at the time of printing, through a certain pressure so that the ink to the substrate through the hole hole Edition (transfer paper, ceramics etc.) on the formation of images or text.

Q: What is the difference between LDPE and PE-LD in a package?: LDPE is a low density polyethylene, environmental protection bag production is one of the raw materials, commonly known as low material, another raw material of HDPE is also called high pressure materials, packaging film, the two materials are mixed according to a certain proportion and then blowing, printing, cutting, packing bag made of,PE-LD is a common environmental protection mark printed on top of the packing bag, which indicates that the manufacturer is using an environmentally-friendly plastic bag.

Q: Plastic packing bag printing color: A few colors, that is, a few colors, with several roll, one color needs a roll, and the more colors you have, the higher the cost of making the plate. Of course, the plate is calculated by area, the greater the size of your area, the higher the cost of making.

Q: What ink is the food packing bag printed on?: At present, in the food plastic packaging and printing, the most widely used is the benzene soluble chlorinated polypropylene ink series. This series of ink production and application technology have been very mature, is mainly used for the gravure printing in BOPP (BOPP) on printing and printing adaptability is very excellent, good processing performance, faster drying. However, there are still many deficiencies in this method of printing.

Q: How many kinds of packing bags are there in the packaged foods?: PE's softness and mechanical properties are worse than those of PP. It represents shopping bags, plastic wrap, garbage bags and so on.PP is stiffer, anisotropic (with a notch that is easily ripped), has good mechanical properties, and is superior to PE in high-temperature performance, representing bread bags.I wonder if this answer has met your requirement.